A question just came in saying 'How many people are in the Pokemon games?', as in NPCs. I, in all honesty, can tell you this now.
Can I make a quick point?
Bulbapedia lists the amount of NPCs in each city, All you need is a calculator and 2/3 minutes, and you have the answer right there. So your example is invalid.
Alot of the questions aren't that difficult to answer. People just don't know where to look, and because of that they immediately have a similar reaction to yours, or they think "omg amazing" and upvote it. One of the two. The egg move one for example,wasn't too bad when both Aeternis and I jumped onto Bulbapedia, and we both just used logic to deduce the most likely scenarios where there would be an Egg Move, which reduced the workload immensely.
You want to ban the questions which take effort and time to answer.
So would you rather DB be filled of bs questions like "How do I get an everstone in Pokemon X/Y???" or "What does adaptability do????". The point of Q/A is to help others. If they want to know it, so what?. If they're obvious point grubbers, do something else, but don't ban questions which affects those which legitimately want to know as well. And people do go to the trouble of putting in effort to answering it in the end, most of the time at least. Perhaps set a limit to how long a question can go unanswered, but don't ban it outright.
I for one, find the occasional annoying, more difficult question better than the rest of the questions on DB.